在这个设定中,氢不再是稳定的,但是其更重些的同位素氘和氚却是稳定的。
In this scenario, hydrogen would no longer be stable, but its slightly heavier isotopes deuterium or tritium could be.
最好的核聚变材料有两种,即氢的同位素——氘和氚。
The best fuels for fusion are two types, or isotopes, of hydrogen - deuterium and tritium.
它使用两种类型,或称同位素,的氢——氘和氚。
Two types, or isotopes, of hydrogen are used - deuterium and tritium.
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